Traffic sign



FIG. 1 is a front view of a traffic sign showing my new design;

FIG. 2 is a back view thereof;

FIG. 3 is a top view thereof; and,

FIG. 4 is a side view thereof.

The broken lines show environment for my design and form no part of the claim. The stippling shown in FIG. 1 depicts a contrasting appearance. 

CLAIM The ornamental design for a traffic sign, as shown and described. 